Two scrollbars in Firefox

[fladd]

Description

In Firefox, there are two issues with scrolling:

1. Scrolling is "jumpy", probably related to dynamically loading content from the chat history
2. There are two scrollbars (superimposed on each other)

Steps to reproduce

• Scroll the chat window

Describe how what happens differs from what you expected.

I expect these issues to not happen.

Log: not sent

Version information

• Platform: web (in-browser) or desktop?
  web (develop)

For the web app:

• Browser: Firefox (59, 60)

• OS: Windows, macOS

• URL: riot.im/develop
  For the desktop app:

• OS: Windows, macOS

• Version: current

[lampholder]

The first part of this (jumpy scrolling) is #2646

The second part of this is a known limitation of a 'fix' to gemini scrollbar - gemini replaces the browser native scrollbar with one that is aesthetically more pleasing (and mac-like, as it happens). By default, gemini doesn't replace the current scrollbar if it thinks it's pretty enough, however this logic was malfunctioning resulting in some sections of the app not being scrollable.

tl;dr we forced gemini scrollbar to always be active, which caused some (known) double scrollbar fun but we didn't think it was noticable, so the bug here is that the current setup results in some quite obvious and ugly double scrollbar :(

I'm going to rename the bug to focus on the double scrollbar and leave #2646 to track the jumpiness.

[fladd]

Thanks for the answer. I don't really understand why replacing a well proven standard element like a browser's native scrollbar with some less proven third-party alternative was necessary (not sure what is unaesthetic about a normal scrollbar), but I think it would be great if this could be deactivated by users who value function over form.

[aaronraimist]

This is also present in Safari

[turt2live]

I'm not seeing this in Firefox 62 (Windows 10) - is it still happening for people?

Also I don't have a Safari to test with, but maybe it magically got fixed in the last 14 days? (please say yes...)

[aaronraimist]

@turt2live No it hasn't gotten fixed in /develop for Firefox, Chrome, or Safari on macOS. I cannot reproduce in Firefox on Elementary OS (Ubuntu) so it may be a macOS only bug (although the original reporter said they found it on Windows too).

[turt2live]

I'm going to pin it as a Mac issue then and hope someone has the bandwidth to fix it

[turt2live]

ftr, this is likely going to be fixed in the upcoming redesign.

[aaronraimist]

@turt2live fixed by getting rid of Gemini or what?

[turt2live]

I think that's the current plan, although it's somewhat subject to change. Getting rid of gemini is a long-term goal of the project in the first place and is likely to be the route taken.

[klopsi]

Firefox renders this page with two scrollbars and pgup/pgdn doesn't work.
[screencap] https://0x0.st/sROe.png
Page works fine in chromium, epiphany-browser, qupzilla, konqueror, qutebrowser.
Is this related to this bug? Can it be fixed?
Firefox Version: 64.0-1 - has been a problem for over a year at least.

[ara4n]

this is still the case currently in the redesign. it should be fixed by killing off gemini everywhere.

[fladd]

still happening in 1.0 😬

[t3chguy]

This should be completely gone now as we just use CSS.